Excitatory or Inhibitory: A New Semantic Orientation Extracts Contradiction and Causality from the Web Chikara Hashimoto author Kentaro Torisawa author Stijn De Saeger author Jong-Hoon Oh author Jun’ichi Kazama author 2012-07 text Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning Jun’ichi Tsujii editor James Henderson editor Marius Paşca editor Association for Computational Linguistics Jeju Island, Korea conference publication hashimoto-etal-2012-excitatory https://aclanthology.org/D12-1057/ 2012-07 619 630